package com.qf.util.plugin;

import java.io.ByteArrayInputStream;
import java.io.UnsupportedEncodingException;
import java.sql.Blob;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;


public class MyBlobTypeHandler extends BaseTypeHandler<String> {  
  //  ###指定字符集  
    private static final String DEFAULT_CHARSET = "utf-8";  
  
    @Override  
    public void setNonNullParameter(PreparedStatement ps, int i,  
            String parameter, JdbcType jdbcType) throws SQLException {  
        ByteArrayInputStream bis;  
        try {  
         //   ###把String转化成byte流  
            bis = new ByteArrayInputStream(parameter.getBytes(DEFAULT_CHARSET));  
        } catch (UnsupportedEncodingException e) {  
            throw new RuntimeException("Blob Encoding Error!");  
        }     
        ps.setBinaryStream(i, bis, parameter.length());  
    }  
  
    @Override  
    public String getNullableResult(ResultSet rs, String columnName)  
            throws SQLException {  
        Blob blob = rs.getBlob(columnName);  
        byte[] returnValue = null;  
        if (null != blob) {  
            returnValue = blob.getBytes(1, (int) blob.length());  
        }  
        try {  
        //    ###把byte转化成string  
            return new String(returnValue, DEFAULT_CHARSET);  
        } catch (UnsupportedEncodingException e) {  
            throw new RuntimeException("Blob Encoding Error!");  
        }  
    }  
  
    @Override  
    public String getNullableResult(CallableStatement cs, int columnIndex)  
            throws SQLException {  
        Blob blob = cs.getBlob(columnIndex);  
        byte[] returnValue = null;  
        if (null != blob) {  
            returnValue = blob.getBytes(1, (int) blob.length());  
        }  
        try {  
            return new String(returnValue, DEFAULT_CHARSET);  
        } catch (UnsupportedEncodingException e) {  
            throw new RuntimeException("Blob Encoding Error!");  
        }  
    }
@Override
	public String getNullableResult(ResultSet arg0, int arg1) throws SQLException {
		// TODO Auto-generated method stub
    Blob blob = arg0.getBlob(arg1);  
    byte[] returnValue = null;  
    if (null != blob) {  
        returnValue = blob.getBytes(1, (int) blob.length());  
    }  
    try {  
        return new String(returnValue, DEFAULT_CHARSET);  
    } catch (UnsupportedEncodingException e) {  
        throw new RuntimeException("Blob Encoding Error!");  
    }  
	}
}  